Ray/s accidentally goes low

Corona Corona for 3ds Max Help Required
1

Hello everyone.

I was working on the scene and everything was perfect.
But suddenly interactive render became very slow.

I have spent 5 hours trying to resolve that issue…
Finally, I left walls and portals and added mtl override (portals are excluded).

Here is screenshot: Welcome - TechSmith Screencast

Super simple scene but rays/s is under 300k. :frowning:
If I add same objects into a new scene Rays/s is 1.5 million! But if I add entire the scene with all objects then it is slow again…

I tried to remove geometry that I have added after last fast render, but no luck…

Any ideas how to troubleshoot issue like that?

Thanks

2

what is your CPU usage? Any photometric lights in the scene?

3

CPU usage is 90 +/- 5
No photometrics, just default Corona environment light, walls and 3 portlals in windows…
All other objects are hidden

4

Check this out. No object at all, ray/s is 200k…what’s wrong there???
On empty scene passes are usually increasing faster than seconds in rendering time

5

Could you run Corona benchmark? Corona Benchmark | Chaos Maybe something wrong with your hardware?

6

That’s Corona 1.2. Any chance you could try with a newer version?
I do not remember when error messages were added. Maybe that’s bitmap paging, or FTH? See:
https://coronarenderer.freshdesk.com/support/solutions/articles/5000680212
https://coronarenderer.freshdesk.com/support/solutions/articles/5000675862

7

Benchmark scene works perfect.
And I got this issue again with my scene :((

I have updated corona to 1.4 but it happens again. Rays/s is 3000-4000 for last 20 mins and just nothing happens…
In Resources Monitor there are a lot of hard faults for 3ds max:

2016-11-21_1907.png
2016-11-21_1907.png547×182 5.86 KB

And also there are still about 4GB RAM free, so I am not running out of the memory.

Restart 3dsmax helped but not for a long time. After couple interactive renders it is not working again

8

Why not 1.5.2?
Can you please submit a support ticket about this and provide your registered email address? https://coronarenderer.freshdesk.com/support/tickets/new